American Eric Volz was wrongfully convicted in Nicaragua and sentenced to 30 years. His conviction was overturned and now he's trying to help Jason Puracal who was sentenced to 22 years in the same notorious prison. Puracal claims he's innocent and there's no evidence to prove otherwise.

Anderson Cooper talks to Volz and Jeffrey Toobin about Puracal's options, and what to expect from his appeal hearing later this month.